Within each group, the teams would play a double round-robin to decide their league position.
The four group winners and the four runners-up contested a first play-off round to decide three promotion slots.
[8] FC Martigny-Sports win 4–2 on aggregate and continue to the finals.
FC Red Star Zürich win 4–2 on aggregate and continue to the finals.
SC Zug win 5–1 on aggregate and continue to the finals.
SC Zug win 4–2 on aggregate and are promoted to 1983–84 Nationalliga B.
[8] FC Martigny-Sports win 5–2 on aggregate and are promoted to 1983–84 Nationalliga B.
FC Red Star Zürich win 6–1 on aggregate and are promoted to 1983–84 Nationalliga B. SC Kriens remain in 1.